Custer County, OK Insulation Payback
Is attic insulation worth it in Custer County, OK?
Custer County sits in IECC climate zone 3 (Mixed-Humid) — real heating and real cooling seasons both, roughly balanced across the year. For a currently uninsulated attic, DOE and ENERGY STAR recommend building up to R-49. Going from R-2 to the recommended R-49 costs roughly $2,820 installed for a typical attic (about 1,000 sq ft), and pays for itself in about 2.2 years at an estimated $1,283/year saved. Few home upgrades pay back that quickly.
The breakdown behind the number
Heating accounts for about $961/year of that and cooling about $322/year — Custer County needs both. Nationally, Custer County ranks in the 37th percentile for insulation savings potential. Compared only against its own climate zone, Custer County places 35th out of 690. Against Oklahoma's own average of $1,260/year, Custer County runs 2% above that.
Custer County's actual weather, not a national average
The heating and cooling degree days behind this estimate — 3,622 HDD and 2,019 CDD (base 65°F, 1991-2020 normals) — come from CLINTON, OK US, the nearest NOAA station with published normals, 10 miles from Custer County's center. By total degree days, Custer County sits at the 43th percentile nationally. Its moisture regime is classified humid, which matters for whether the attic needs a vapor retarder as part of the job — worth asking a contractor about locally.
If the attic isn't bare
A shallower starting point changes the math: with R-11 already down, only the gap to R-38 needs filling, at roughly $1,620 for an estimated $173/year saved (~9.4-year payback). Whether that is worth it depends on how long you plan to stay.
Next steps for a Custer County attic
Actual quotes will vary by attic access, existing debris, and whether the job needs air sealing first. Treat the $2,820 figure above as a planning number for Custer County, not a bid - contractors typically charge a $600 minimum regardless of job size.
Custer County's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Custer County's numbers, and where the cost assumptions come from. See the DIY vs. contractor guide for whether a job this size is realistic to do yourself.